GE Built in Dishwasher

You possibly have several problems. The plunger is broken to the dispenser. You will have to disassemble the door to check the dispenser. Your water not draining is why the dishes aren't getting clean. Check to see if your drain hose is clogged. It may drain at a disposal or through a siphon gap which is mounted to the rear of your sink. Sometimes the siphon gap gets clogged and will cause drainage problems. It sometimes is located at the right or left rear of the sink and has a cap that sits about 3 to 5 inches high. Take the cap off and make sure there is no clog.